📝[DOCS] Fix issues in `README.md`

[RushilJalal]

Issue Description

Issues:

• README.md has 30+ linting warnings as identified by markdownlint
• Incorrect info such as:
  • AI-powered chatbox(There is no AI in the chatbox)
  • No language support
  • Is MySQL used? If no, this must be removed
• 'Technologies used' and 'Tech Stack' sections are similar and thus redundant. Only one of these should remain.
• Outdated list of contributors

I would like to fix these issues

Screenshots or Examples (if applicable)

Checklist

• [X] I have checked the existing issues.
• [X] I have read the Contributing Guidelines.
• [X] I have read the Code Of Conduct.
• [X] The changes doesn't break the code

[github-actions[bot]]

Hello @RushilJalal! Thanks for creating issue #180 on #Indie-Kart/ecommerce-store.Please Comment /assign-me to self assign this issue to yourself, and please don't forget to star this repo.

[RushilJalal]

/assign-me